I've seen the book and think that it's quite good, though it isn't a book for GMs like Avrukh's seemed to be. Which for the majority of us is probably a good thing!

I don't remember all of the lines in it or what Avrukh covered offhand, but McDonald covers both 8.a4 and 8.Qxc4 in the main line, and each of 10.Bd2, 10.Bf4, and 10.Bg5 after 8...b5 9.Qc2 Bb7. It's more of an up-to-date overview from White's perspective than a repertoire book.

If I remember correctly, McDonald only covers 8.Nbd2 in the Closed Catalan with 4...Be7, which is also what Avrukh gave. I personally have always played 8.Rd1, so don't have anything to add about that. In the 4...Bb4+ 5.Bd2 Be7 Closed Catalan, he covers 9.Rd1 b6 and then 10.Bf4 and 10.b3, with a preference for 10.b3. Of course, he also covers the Stonewall treatment from Black beginning with 8...Ne4.

McDonald also covers sixth move deviations for White like 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.g3 Be7 5.Bg2 0-0 6.Nbd2 and 6.Qc2 (instead of 6.0-0 allowing a main line 6...dxc4 7.Qc2) and does a good job explaining the pros and cons of those moves, while seeming to conclude that they are inferior.

McDonald gives coverage of 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.g3 dxc4 5.Qa4+ too, which is nice to see. He thinks that 5...Nbd7! is best. He uses this analysis to compare with 1.Nf3 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Qa4+, when he does seem to think that White can get an advantage (I remember this line from some analysis by Mednis years ago).

McDonald does a great job of explaining the ideas behind lines like 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.g3 dxc4 5.Bg2 a6 6.0-0 Nc6 7.Bg5 Be7 8.e3!, and all of those other gambit lines where Black wants to cling to the pawn on c4.

Anyway, it looks like a great book, but it's certainly more along the lines of a book from Everyman Chess in the sense that it does a fantastic job covering all of the ideas of the opening, but is not an analytical tome. Not that I remember any mistakes in analysis or missing lines offhand, but it's more like Mathew Sadler's Queen's Gambit Declined than Avrukh's GM Repertoire.